Home / 1,223,107.72-1,688,733.14-764,428.48

Finding the Fourth Proportional to 1,223,107.72, 1,688,733.14 and 764,428.48

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Solution

The fourth proportional to 1,223,107.72, 1,688,733.14 and 764,428.48 is: 1,055,439.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,223,107.72 : 1,688,733.14 = 764,428.48 : x
  2. Step 2: Convert to fraction form
    1,223,107.72/1,688,733.14 = 764,428.48/x
  3. Step 3: Cross multiply
    1,223,107.72x = 1,688,733.14 × 764,428.48
  4. Step 4: Simplify right side
    1,223,107.72x = 1,290,915,707,335.83
  5. Step 5: Solve for x
    x = 1,290,915,707,335.83/1,223,107.72
  6. Step 6: Final answer
    x = 1,055,439.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.